• Add MagLev 1.0.0
• Added support for overriding make options with the
  $MAKEOPTS/$MAKE_OPTS environment variable
• Removed RubyGems installations from JRuby definitions in favor of
  the bundled RubyGems versions
• Add a before_install_package hook
• Add REE 1.8.7-2009.09 and 1.8.7-2010.01
• Add Ruby 1.8.6-p383, 1.8.7-p302 and 1.8.7-p357
• Update the JRuby 1.7.0-dev snapshot URL
• Changed the GCC detector to look for gcc-* anywhere in the
  $PATH, not just /usr/bin